LUBBOCK, Texas -- A college student from Saudi Arabia who studied chemical engineering in Texas bought explosive chemicals online as part of a plan to hide bomb materials inside dolls and baby carriages to blow up dams, nuclear plants or the Dallas home of former President George W. Bush, the Justice Department said Thursday.

"After mastering the English language, learning how to build explosives and continuous planning to target the infidel Americans, it is time for jihad," or holy war, Khalid Ali-M Aldawsari wrote in his private journal, according to court documents.